Dispensing device



Patented Oct. 21, 1941 fifS'PENSING'D vieia Bryant-woken Siiiitli, -Jr., Berkeley, Calif., assignor to Braun-Kne'oht-Heimann..00., a corpora-1 tion of California Application-August '11, 1929*, serial in ist-sis 7 2 Claims.

present iziveiition'rel'at'estd iriiprcvemnts ifi'disp'ehsihgdevib'es' and its trmeipa etjeetis to provide a means whereby poise'nou gases be dispensed from a tin ailer siinflai' receptacle a simple inahiier and without danger to the operator. p More particularly the invention was developed ass s ecial dispensing means for mahm promise; an extremely poisonous substance which is sold in the market in tin cans .in liquid form and which turns into gas; immediately upon release {from the can "aii'd discharges therefrom ufiuer great pressure. The gas is used for fumigating purposes and also for the I 'e'z'itermi'hatioh of rodents, such as sqi'iir'r'els,"the operator moving from hole to hole and discharging a preferably predetermined amount of gas into each here.

it is proposed in the present invention to pro- -vide a dispensing device that be" readily at tache'df to the can and that durihgthe attaching operation pierces the can and coiihe'c'ts' the contents thereof to a suitable outlet conduit, such as a hose 'or thelik'e. V l 1 i It is further proposed to construct the device such a manner that auringr r'evefi immediately prior to the piercing operation a seal is" auto-T inatically formed around the hole so that there is no'danger of gases" escaping while thede'vice is'be'in'g attached.

It is further proposed to provide attaching meanseitr mely q'uicli ifl action so that the piercing and sealing operation is practically instantaneous and the danger of gases escaping is reduced correpondingly.

And finally it is proposed to provide suitable control means for the discharge of the gases, whereby the latter may be discharged in measured quantities through a metering chamber, the control means being arranged so that there is never a direct connection between the main supply in the can and the atmosphere.

Further objects and advantages of my invention will appear as the specification proceeds and the novel features thereof will be set forth in the claims hereto appended.

The preferred form of my invention is illustrated in the accompanying drawing, in which:

Figure 1 shows a side elevation of my device as attached to a can;

Figure 2, a similar side elevation of a portion of the device with the metering chamber and valve omitted, parts being shown in section;

Figure 3, a similar side elevation, with parts shown in section and with the can illustrated in a position preparatory to the piercing operation:

and

' "g'ure 4, a side elevation 'ofthe'uevice taken at right angles to' that of Figure 2.

While I have ShOWI'i omy the preferred of my invention, I wish'to have it understood that various changes or niodifiatio'nsfiiay be; de within the scope of the claims" hereto-attached without de arting from the'spilit of the in tion. Particularly, while only'one particular use of the invention is described in th present specification, it is apparent that theinventi'on will lend itself to many different uses.

Referring to the drawing in detail, the can I may be 'of any suitable manufacture and isher illustrated as a cylindrical can having dished ends'z which "are ofno' particular moment for the purposes of this invention. v I V Y My device comprises in its principal featui a cap 3 having a or" flange 4 adapted to receive one end of the can and being provided witha washer 5, which engages the riifi bf th can to form a gas tightr seal therewith when the can is in position.

The cap'has a hon bw mimetthreaded into the bottom thereof, the fittingterminating in; side the cap, in a puncturing tube 1. The latter is cut, at its upper end, along a tapered line; as shown'at 8, soas to come tofa point and arranged to cutinto the cap. The hole made in the can substantially corresponds to the" outer diameter of the tube, although it will be slightly larger and out of shape due to the angular movement of the can as will be hereinafter described. It should be noted that the puncturing device is placed relatively near the rim of the cap but sufliciently far away to clear the washer 5.

The projecting end of the fitting, which forms the puncturing element, is surrounded by a sleeve-like washer 9 which is of at least the same length or preferably a little longer than the puncturing element so that the washer engages with the end of the can before the puncturing element becomes active and forms an effective seal with the can end around the section to be punctured.

For attaching the can to the cap. I provide a yoke l0 fitting over the can and having an end member H and two side members I! and I3. The latter is pivoted to the rim of the cap as at I4, through a suitable bracket IS, with freedom of swinging motion in a radial plane. The pivot I4 is arranged diametrically opposite the puncturing element 1.

The side member I2 is somewhat shorter than the other side member and is spaced therefrom by the width of the cap. It is connected to the opposite side of the rim by means of a bracket or link l6 and a lever H which latter is fulcrumed in the lower end of the side member l2, as at l8, and has an intermediate portion pivoted to the link ['6 as at 20.

When the lever is in substantially horizontal position, as in Figure 3, the yoke tilts relative to the cap and allows of insertion of the can, and when the end of the lever is thrown upward into a position substantially vertical, it draws the side member I! downward and causes both the yoke and the can to move into rectangular position I with respect to the cap.

The lever I1 is preferably made channelshaped so that it straddles the side member l2 when in end position for holding the can, and the link It branches into a fork l9 (seeFigure 4) which straddles the lever I! in end position and allows the pivot to go somewhat beyond the fulcrum l8 for locking the lever against reverse motion. The lower end of the side member'IZ terminates in a block 2| which makes a sliding fit with the channel-shaped lever l1.

When the can is made to descend from'the position shown in Figure 3, its bottom face strikes the puncturing member 1 and is pierced thereby, the washer 9 sealing oil" the section to be punctured before the puncturing commences and receding during the operation.

At the. end of the operation the entire rim of the can is firmly pressed uponthe washer 5, which then forms a second seal preventing gases from escaping except through the fitting 6.

The latter fitting connects with a three-way valve housing 22 which has an outlet 23 connecting with a metering chamber 24 and a second outlet 25 connecting with a suitable conduit 26 leading to the place of application.

I A valve 21 in the housing, operable by a handle 28 has a port 29 adapted to establish communication between the fitting B and the metering chamber in one position and between the metering chamber and the conduit 26 in another position. The metering chamber is closed by va transparent window 30' held in place by a cap 3| and suitable washers 32. v

In operation, the yoke I0 is first swung into tilted position, as shown in Figure 3, by operation of the lever l1, whereupon the can is inserted.

Next the free end of the lever I1 is pressed upward, which causes the yoke and the can to come downward and which causes the puncturing member I to enter the can, while the washer 9 forms a sealing means around the puncturing member. Towards the end of the operation, the rim of the can bears on the washer "5, which forms a second sealing means.

The device is now ready for use and the operator may now turn the valve to alternately fill and empty the metering chamber 24.

I claim:

1. In a dispensing device for a can or the like, a wire yoke adapted to fit over one end of the can and having legs extending alongside of and parallel to opposite sides of the can, a cap adapted to fit over the other end of the can and having an annular flangeand a washer confined within the flange, means for pivotally connecting one section of the flange to one of the legs of the yoke, a lever mechanism comprising a lever pivoted to the other leg and a link connecting an intermediate' portion of the lever and an opposite section of the flange, the'lever mechanism and the pivotal connection being operable for drawing the cap and the washer upon the can for air-tightly sealing the second end thereof; and a piercing element carried by the cap for pierc ing the latter can end while the lever mechanism is operated.

2. In a'dispensing device for a can or the like, a wire yoke adapted to fit over one end of the can and having legs extending alongside of and parallel to oppositev sides of the can, a cap adapted to'fit over the other end of the can and having an annular flange and a washer confined within the flange, means for pivotally connecting one section of the flange to one of the legs of the yoke, a lever mechanism comprising a lever pivoted to the other leg and a link connecting an intermediate portion of the lever and opposite section of the flange, the lever mechanism and the pivotal connection being operable for drawing the cap and the washer upon the can for airtightly sealing the second end thereof, and a piercing element carried by the cap for piercing the latter can end while the lever mechanism is operated, the piercing element having a washer therearound for sealing the hole in the can end made thereby. v

I BRYAN HOOKER SMITH, JR. 

